<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!--2. 为echarts准备具备大小(宽高)的Dom -->
      <div id="main" style="width:750px;height:400px;"></div>
    </el-card>
  </div>
</template>
<script>
// 1.导入echarts
import echarts from 'echarts'
// 通过lodash合并options和请求返回来的数据
import _ from 'lodash'
export default {
  data() {
    return {
      // 需要合并的数据
      options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        }
      }
    }
  },
  created() {},
  //3. 此时页面渲染完毕 可以初始化图表实例了
  async mounted() {
    var myChart = echarts.init(document.getElementById('main'))
    // 4.准备数据和配置项

    const { data: res } = await this.$http.get('reports/type/1')
    if (res.meta.status !== 200) {
      return this.$message.error('获取图表数据失败')
    }
    const result = _.merge(this.options, res.data)
    // 5.展示数据
    myChart.setOption(result)
  },
  methods: {}
}
</script>
<style lang="less" scoped>
</style>
